Suppose that the flux from a planet is measured to be 360 w/m^2. What is its ave

Question

Suppose that the flux from a planet is measured to be 360 w/m^2. What is its average temperature? 3.8 degree k 280 degree k 760 degree k 6.17 times10^9 degree k The object that created Arizona's Meteor Crater was estimated to have a radius of 25 meters and a mass of 300 million kg. Follow Working it out 6.2 to calculate the density of the impacting object. What was its likely composition. The density of rock is 2000 kg/m^3-3000 kg/m^3 Density is found from rho=M/v 1000 kg/m^3; similar to water or ice 2500 kg/m^3, similar t rock 4580 kg/m^3; similar to metals 8960 kg/m^3; similar to copper

Explanation / Answer

4) flux F= 350 W/m^2

F = (sigma)T^4

sigma = 5.76*10^-8 W/m^2.K^4

350 = 5.76*10^-8*T^4

T = 280 K

5) r = 25 m , m = 300*10^6kg

p = mass/volume

p = 300*10^6/((4/3)*3.14*25^3)

p = 4580 kg/m^3, similar to metals

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